davideicardi/dns.aspx

## dns.aspx
<!-- directives -->
<% @Page Language="C#" %>
<%@ Import namespace="System.Net" %>

<!-- call example:
  https://server/_diagnostics/dns.aspx?hostName=microsoft.com
   -->
<script runat="server">
  private string HostName2IP(string hostname)
  {
      var iphost = System.Net.Dns.GetHostEntry(hostname);
      var addresses = iphost.AddressList;
      var addressList = new System.Text.StringBuilder( );
      foreach(var address in addresses)
      {
          addressList.Append("IP Address: ");
          addressList.Append(address.ToString( ));
          addressList.Append(";");
      }
      return addressList.ToString( );
  }

   private void Resolve(string hostName, int executionCount)
   {
     outputText.InnerHtml = "";

     outputText.InnerHtml += "RESOLVING " + hostName + " <br/>";
      for (int i = 0; i < executionCount; i++)
      {
    	  try
    	  {
            outputText.InnerHtml += " SUCCESSFUL " + HostName2IP(hostName);

            outputText.InnerHtml += "<br/>";
    	  }
    	  catch (Exception ex)
    	  {
    		  outputText.InnerHtml += "FAILED " + ex.ToString() + " <br/>";
    	  }
      }
   }

   private void ResolveClick(object sender, EventArgs e)
   {
     var executionCountInt = int.Parse(executionCount.Value);
     Resolve(hostName.Value, executionCountInt);
   }

   private void Page_Load()
   {
     var hostName = Request.QueryString["hostName"];
     if (string.IsNullOrWhiteSpace(hostName)) return;

     var executionCount = Request.QueryString["executionCount"] ?? "1";
     var executionCountInt = int.Parse(executionCount);

     Resolve(hostName, executionCountInt);
   }
</script>

<html>
   <head>
      <title> Resolve Host Test </title>
   </head>
   <body>
      <h3> Resolve Host Test </h3>
      <p>Machine name: <%= System.Environment.MachineName %></p>
      <form runat="server">
		  <h4>Host Name</h4>
         <input runat="server" id="hostName" type="text" value="google.com" style="width:300px" />
		 <br />
		  <h4>Retry count</h4>
         <input runat="server" id="executionCount" type="text" value="1" />
		 <br />
         <input runat="server" id="button1" type="submit" value="Resolve" OnServerClick="ResolveClick" />

         <hr />
         <h3> Results: </h3>
         <span runat="server" id="outputText" />
      </form>
   </body>
</html>
	<!-- directives -->
	<% @Page Language="C#" %>
	<%@ Import namespace="System.Net" %>

	<!-- call example:
	https://server/_diagnostics/dns.aspx?hostName=microsoft.com
	-->
	<script runat="server">
	private string HostName2IP(string hostname)
	{
	var iphost = System.Net.Dns.GetHostEntry(hostname);
	var addresses = iphost.AddressList;
	var addressList = new System.Text.StringBuilder( );
	foreach(var address in addresses)
	{
	addressList.Append("IP Address: ");
	addressList.Append(address.ToString( ));
	addressList.Append(";");
	}
	return addressList.ToString( );
	}

	private void Resolve(string hostName, int executionCount)
	{
	outputText.InnerHtml = "";

	outputText.InnerHtml += "RESOLVING " + hostName + " <br/>";
	for (int i = 0; i < executionCount; i++)
	{
	try
	{
	outputText.InnerHtml += " SUCCESSFUL " + HostName2IP(hostName);

	outputText.InnerHtml += "<br/>";
	}
	catch (Exception ex)
	{
	outputText.InnerHtml += "FAILED " + ex.ToString() + " <br/>";
	}
	}
	}

	private void ResolveClick(object sender, EventArgs e)
	{
	var executionCountInt = int.Parse(executionCount.Value);
	Resolve(hostName.Value, executionCountInt);
	}

	private void Page_Load()
	{
	var hostName = Request.QueryString["hostName"];
	if (string.IsNullOrWhiteSpace(hostName)) return;

	var executionCount = Request.QueryString["executionCount"] ?? "1";
	var executionCountInt = int.Parse(executionCount);

	Resolve(hostName, executionCountInt);
	}
	</script>

	<html>
	<head>
	<title> Resolve Host Test </title>
	</head>
	<body>
	<h3> Resolve Host Test </h3>
	<p>Machine name: <%= System.Environment.MachineName %></p>
	<form runat="server">
	<h4>Host Name</h4>
	<input runat="server" id="hostName" type="text" value="google.com" style="width:300px" />
	<br />
	<h4>Retry count</h4>
	<input runat="server" id="executionCount" type="text" value="1" />
	<br />
	<input runat="server" id="button1" type="submit" value="Resolve" OnServerClick="ResolveClick" />

	<hr />
	<h3> Results: </h3>
	<span runat="server" id="outputText" />
	</form>
	</body>
	</html>